(function (doc, win) {
        // 分辨率Resolution适配
        var docEl = doc.documentElement,
            resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize',
            recalc = function () {
                var clientWidth = docEl.clientWidth;
                if (!clientWidth) return;
                
                docEl.style.fontSize = 100 * (clientWidth / 320) + 'px';
                $(".container").css("width","3.2rem");
                $(".container").css("height","1.8rem");
            
            };

        if (!doc.addEventListener) return;
        win.addEventListener(resizeEvt, recalc, false);
        doc.addEventListener('DOMContentLoaded', recalc, false);
        
        // 一物理像素在不同屏幕的显示效果不一样。要根据devicePixelRatio来修改meta标签的scale,要注释上面的meta标签
        (function(){
            return;
            var dpr = scale =1;
             var isIPhone = win.navigator.appVersion.match(/iphone/gi);
            var devicePixelRatio = win.devicePixelRatio;
            if (isIPhone) {
                // iOS下，对于2和3的屏，用2倍的方案，其余的用1倍方案
                if (devicePixelRatio >= 3 && (!dpr || dpr >= 3)) {                
                    dpr = 3;
                } else if (devicePixelRatio >= 2 && (!dpr || dpr >= 2)){
                    dpr = 2;
                } else {
                    dpr = 1;
                }
            } else {
                // 其他设备下，仍旧使用1倍的方案
                dpr = 1;
            }
               scale = 1 / dpr;
               
               // 
               var metaEl = "";
               metaEl = doc.createElement('meta');
             metaEl.setAttribute('name', 'viewport');
             metaEl.setAttribute('content', 'initial-scale=' + scale + ', maximum-scale=' + scale + ', minimum-scale=' + scale + ', user-scalable=no');
           
            if (docEl.firstElementChild) {
                docEl.firstElementChild.appendChild(metaEl);
            } else {
                var wrap = doc.createElement('div');
                wrap.appendChild(metaEl);
                doc.write(wrap.innerHTML);
            }
        })();       
    })(document, window);    